How the Carhartt Work in Progress website loads 1.9x faster with Speed Kit

Published on
October 19, 2020
Contact our team
Let's check your website speed.
Contact sales
Share case study
Everyone benefits from speed.


Carhartt Work in Progress (WIP) is a licensee of the Carhartt workwear brand from the United States focused on offering street wear styles to subcultures like skating, graffiti, hip hop, or BMX. Carhartt WIP has expanded across Europe and beyond. For their online business, it is particularly important to consistently provide a great customer experience, scalable across millions of users of various markets. Page speed was identified to have significant improvement potentials, especially because of its SEO implications.

"The great thing about Speed Kit is its scalability and fast implementation. We were able to go live within a matter of days and could implement it across our three biggest markets, Germany, France, and the UK, at the same time. The results are impressive, and by now Speed Kit is live on all our major country sites."

Marc Lohausen, Head of Ecommerce
Faster website (First Contentful Paint)
More fast users in Google ranking
1 week
Go live with instant results



Speed Kit was added to the shop system with two JavaScript files. The digital agency of Carhartt WIP managed the frontend side and configured Speed Kit together with our team.


After a week Speed Kit was set up, tested, and ready for the pilot.

Google Performance Rating:

It was then successfully evaluated in an empirical A/B test on real-user data for the three largest country online shops.


Book a free website speed check

We analyze your website speed, identify web vitals issues, and compare your competitors.

Book free speed check
iPhone 15 Device CheckLaser Scanner